TireSizesFinder

35x11.50R17 vs 35x12.50R18

35x12.50R18 is 0.00 in (0.0 mm) taller than 35x11.50R17, a 0.00% diameter difference. With the speedometer set for 35x11.50R17, an indicated 60 mph is 60.0 mph on 35x12.50R18.

Is this a safe swap?

Diameter difference 0.00%: under 1%

By overall diameter alone, 35x12.50R18 is a near match for 35x11.50R17; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 35x11.50R17 (35.00 in) vs 35x12.50R18 (35.00 in)35x11.50R1735.00 in × 11.50 in35x12.50R1835.00 in × 12.50 in
Side profile and tread width, drawn to the same scale.
35x11.50R17 vs 35x12.50R18 differences
Measurement35x11.50R1735x12.50R18Difference% diff
Overall diameter35.00 in (889.0 mm)35.00 in (889.0 mm)0.00 in (0.0 mm)0.00%
Sidewall height9.00 in (228.6 mm)8.50 in (215.9 mm)−0.50 in (−12.7 mm)−5.56%
Section width11.50 in (292.1 mm)12.50 in (317.5 mm)+1.00 in (+25.4 mm)+8.70%
Circumference109.96 in (2,792.9 mm)109.96 in (2,792.9 mm)0.00 in (0.0 mm)0.00%
Revolutions per mile57657600.00%
True speed with the speedometer calibrated for 35x11.50R17
IndicatedActual on 35x11.50R17Actual on 35x12.50R18Difference
30 mph30.0 mph30.0 mph0.0 mph
60 mph60.0 mph60.0 mph0.0 mph
75 mph75.0 mph75.0 mph0.0 mph

Ride-height change: 35x12.50R18 does not change the vehicle at the axle (half the 0.0 mm diameter difference).

35x12.50R18 is the same height as 35x11.50R17 and 25 mm wider, a 0.00% difference in overall diameter.

With the speedometer calibrated for 35x11.50R17, an indicated 60 mph is actually 60.0 mph on 35x12.50R18, and revolutions per mile change from 576 to 576.

35x12.50R18 mounts on a 18-inch wheel, a plus-1 fitment from the 17-inch wheel of 35x11.50R17.

Size pages

Other comparisons with 35x11.50R17

Other comparisons with 35x12.50R18

Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.